CN113232404A

CN113232404A - PCB fixing device for solder paste printer and using method thereof

Info

Publication number: CN113232404A
Application number: CN202110518455.2A
Authority: CN
Inventors: 符永胜; 胡稳; 张先文; 舒恒
Original assignee: Anhui Grandseed Automation Equipment Co ltd
Current assignee: Anhui Grandseed Automation Equipment Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-08-10

Abstract

The invention discloses a PCB fixing device for a solder paste printer and a using method thereof, relates to the technical field of solder paste printers, and aims to solve the problems that a printing positioning table of the conventional solder paste printer is low in positioning efficiency, difficult to tightly attach to a steel mesh and easy to influence the printing quality because the PCB is fixed mainly in a clamping mode. The upper surface mounting of bottom plate has the location base, the jacking platform is installed to the top of location base, and the lower extreme of jacking platform extends to the inside of location base, vacuum generator is installed to the upper end of jacking platform, vacuum generator's upper surface mounting has location panel, and location panel's inner chamber and vacuum generator are linked together, all install the pillar around the bottom plate upper surface, and the pillar is provided with four, braced frame is installed to the upper end of pillar, the initiative lead screw is installed to one side of braced frame upper surface, driven lead screw is installed to the opposite side of braced frame upper surface.

Description

PCB fixing device for solder paste printer and using method thereof

Technical Field

The invention relates to the technical field of solder paste printing machines, in particular to a PCB fixing device for a solder paste printing machine and a using method thereof.

Background

The solder paste printer generally comprises a printing positioning table, a solder paste adding mechanism, a stamping mechanism, a power transmission circuit board and other structures, and the working principle of the solder paste printer is that a circuit board to be printed is fixed on the printing positioning table, then solder paste or red glue is subjected to screen printing on a corresponding bonding pad through a steel mesh by a left scraper and a right scraper of the printer, and then a PCB with uniform screen printing is input to a chip mounter through a transmission table for automatic chip mounting processing.

However, the printing positioning table of the existing solder paste printing machine mainly adopts a clamping mode to fix the PCB, has low positioning efficiency, is difficult to be tightly attached to a steel mesh, and easily influences the printing quality; therefore, we propose a PCB fixing device for a solder paste printer and a method for using the same, so as to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a PCB fixing device for a solder paste printer and a using method thereof, and aims to solve the problems that the PCB is fixed by a printing positioning table of the existing solder paste printer mainly in a clamping mode, the positioning efficiency is low, the PCB is difficult to be tightly attached to a steel mesh, and the printing quality is easily influenced.

In order to achieve the purpose, the invention provides the following technical scheme: a PCB fixing device for a solder paste printer comprises a bottom plate, wherein a positioning base is mounted on the upper surface of the bottom plate, a jacking table is mounted above the positioning base, the lower end of the jacking table extends into the positioning base, a vacuum generator is mounted at the upper end of the jacking table, a positioning panel is mounted on the upper surface of the vacuum generator, the inner cavity of the positioning panel is communicated with the vacuum generator, supporting columns are mounted on the periphery of the upper surface of the bottom plate, the number of the supporting columns is four, a supporting frame is mounted at the upper end of each supporting column, a driving lead screw is mounted on one side of the upper surface of each supporting frame, a driven lead screw is mounted on the other side of the upper surface of each supporting frame, a cleaning mechanism is mounted between each driving lead screw and each driven lead screw, foot seats are mounted on the periphery of the lower surface of the bottom plate, the number of the foot seats is four, and an inspection door is mounted on the front end surface of the positioning base, one side of the access door is rotatably connected with the shell of the positioning base through hinges, the number of the hinges is two, and the other side of the access door is connected with the positioning base in a locking mode through a bounce lock.

Preferably, the internally mounted of location base has the pneumatic cylinder, the inside of jacking platform is provided with interior cavity, the lower surface mounting of jacking platform has the baffle, the output of pneumatic cylinder runs through the baffle and extends to the inside of interior cavity, and through connecting piece and interior cavity fixed connection.

Preferably, the guide post is all installed to the both sides of pneumatic cylinder, and the one end and the location base inner wall fixed connection of guide post, the other end of guide post runs through the baffle and extends to the inside of interior cavity, and installs the stopper, linear bearing is installed with the junction of baffle to the guide post.

Preferably, the filtration relief pressure valve is installed to one side of location base inner wall, and filters the relief pressure valve and pass through bracket and location pedestal connection, one side of vacuum generator is provided with the gas vent, the solenoid valve is installed to vacuum generator's opposite side, the solenoid valve communicates with the exhaust end of filtering the relief pressure valve through the air supply pipe, install the air duct on the air inlet of filtration relief pressure valve, and the one end and the air compressor machine of air duct are linked together.

Preferably, the upper surface of the positioning panel is provided with a sponge plate, the sponge plate is provided with an adsorption hole, and the adsorption hole is provided with a plurality of and is communicated with the inner cavity of the positioning panel.

Preferably, the driven guide rail of belt is installed to one side of location panel, belt initiative guide rail is installed to the opposite side of location panel, install second step motor on the outer wall of belt initiative guide rail one end, the one end of driven guide rail of belt and belt initiative guide rail is passed through the gangbar transmission and is connected.

Preferably, the lead screw is all installed to the inside of initiative lead screw and driven lead screw, first step motor is installed to the one end of initiative lead screw, and the output and the screw drive of first step motor are connected, the one end of lead screw runs through and extends to the outside of initiative lead screw and driven lead screw, and installs the belt pulley, connect through belt drive between the belt pulley, install the slider on the lead screw, and the slider is connected with screw drive, the both ends of clearance mechanism all with slider fixed connection.

Preferably, the upper end of the cleaning mechanism is provided with a dust collecting pipe interface, one side inside the cleaning mechanism is provided with a static removing brush, and the static removing brush is in threaded connection with the cleaning mechanism shell through a screw.

Preferably, the front end of the static electricity removing brush is provided with three suction fans.

Preferably, the use method of the PCB fixing device for the solder paste printer includes the following steps:

the method comprises the following steps: the device is arranged in a solder paste printing machine, the jacking table is positioned under the steel net frame, and the transmission tables are arranged at two ends of the solder paste printing machine;

step two: the PCB is conveyed to the positioning panel through the conveying table, and is assisted to move to the center of the panel through belt guide rails on two sides of the panel;

step three: starting an external air compressor, performing pressure reduction and filtration treatment on compressed air through a filter pressure reducing valve, introducing the compressed air into a vacuum generator, and firmly adsorbing the PCB on the positioning panel by using vacuum suction force generated by negative pressure;

step four: starting a hydraulic cylinder to drive a jacking table to move upwards so as to enable the PCB to be attached to a cleaning mechanism, then driving the cleaning mechanism to move from left to right along the surface of the PCB by utilizing a lead screw, brushing off dust on the outer wall of the PCB by a static removing hairbrush in the cleaning mechanism in the moving process, and collecting the dust to an external cloth bag by a suction fan on one side of the hairbrush so as to finish the surface cleaning work of the PCB;

step five: the PCB board clearance back that finishes, further drive the pneumatic cylinder, continue to drive the jacking platform and shift up, make the close laminating of PCB board fit in the steel mesh, scrape about by the printing machine tin cream pass through the steel mesh screen printing on the PCB board, the screen printing back that finishes, the jacking platform resets, and close vacuum generator and stop the adsorption work, the belt guide rail through the location panel both sides shifts the even PCB of screen printing to the transmission bench of delivery outlet, further send the PCB board to the chip mounter by the transmission bench and carry out subsequent processing.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention installs the positioning panel on the jacking table, and the lower end of the panel is installed with the vacuum generator, when the PCB is placed on the positioning panel, the external air compressor can be started, the compressed air after decompression and filtration is led into the vacuum generator, the PCB is firmly adsorbed on the positioning panel by using the vacuum suction force generated by negative pressure, the positioning work is realized, and the surface of the positioning panel is provided with a layer of sponge plate, the surface of the sponge plate is soft and has high plasticity, when the PCB with uneven surface is adsorbed, the adsorption and positioning effect is not influenced even if the PCB with uneven surface is not completely adsorbed, the positioning requirements of various PCBs can be effectively realized, when printing, the PCB can be tightly attached only by driving the hydraulic cylinder at the lower end of the jacking table to drive the PCB to move up to the steel mesh of the solder paste printing machine, the printing quality is ensured, the problem that the printing positioning table of the existing solder paste printing machine mainly adopts the clamping mode to fix the PCB is solved, the positioning efficiency is low, and the steel mesh is difficult to be tightly attached, so that the printing quality is easily influenced.

2. Through setting up screw guide in the both sides of device, and install clearance mechanism between screw guide's slider, after the PCB board location finishes, but starting hydraulic cylinder drives the jacking platform and shifts up, make PCB board and clearance mechanism laminating, later utilize the lead screw to drive clearance mechanism along PCB board surface from the left right side removal, move the in-process, by the dust on the static brush scrubbing PCB board outer wall in the clearance mechanism, and collect the dust to external sack through the extraction fan of brush one side, accomplish the surface cleaning work of PCB board, avoid the influence that the dust produced subsequent printing, the quality of tin cream printing has been improved.

3. Set up the belt guide rail through the both sides at positioning panel, and connect through the gangbar transmission between two sets of belt guide rails, when tin cream printing machine production, can install feeding transmission platform and ejection of compact transmission platform respectively at the printing machine both ends, play the effect of accepting the PCB board by the belt guide rail to after PCB board is printed and is done over, can shift it to ejection of compact transmission bench again, make the device can carry out automatic continuous processing, effectively improved printing efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a positioning base and a jacking platform of the present invention;

FIG. 3 is a schematic view of the internal structure of the positioning base of the present invention;

FIG. 4 is a schematic view of the connection structure of the driving screw and the driven screw according to the present invention;

FIG. 5 is a schematic view of the internal structure of the cleaning mechanism of the present invention;

in the figure: 1. a base plate; 2. a foot seat; 3. a positioning base; 4. an access door; 5. a jacking table; 6. a positioning panel; 7. a belt driven guide rail; 8. a pillar; 9. a support frame; 10. a driven lead screw; 11. an active lead screw; 12. a first stepper motor; 13. a belt pulley; 14. a belt; 15. a slider; 16. a cleaning mechanism; 17. a dust collecting pipe interface; 18. a belt active guide rail; 19. a sponge plate; 20. an adsorption hole; 21. a vacuum generator; 22. a linkage rod; 23. a second stepping motor; 24. a hinge; 25. a bounce lock; 26. a gas supply pipe; 27. an exhaust port; 28. an electromagnetic valve; 29. a filtering pressure reducing valve; 30. a hydraulic cylinder; 31. an inner cavity; 32. a connecting member; 33. a partition plate; 34. a guide post; 35. a linear bearing; 36. a limiting block; 37. a screw rod; 38. a static electricity removing brush; 39. an air extracting fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an embodiment of the present invention is shown: a PCB fixing device for a solder paste printer comprises a bottom plate 1, wherein a positioning base 3 is installed on the upper surface of the bottom plate 1, a jacking table 5 is installed above the positioning base 3, the lower end of the jacking table 5 extends into the positioning base 3, a vacuum generator 21 is installed at the upper end of the jacking table 5, a positioning panel 6 is installed on the upper surface of the vacuum generator 21, the inner cavity of the positioning panel 6 is communicated with the vacuum generator 21, supporting columns 8 are installed on the periphery of the upper surface of the bottom plate 1, four supporting columns 8 are arranged, a supporting frame 9 is installed at the upper end of each supporting column 8, a driving lead screw 11 is installed on one side of the upper surface of each supporting frame 9, a driven lead screw 10 is installed on the other side of the upper surface of each supporting frame 9, a cleaning mechanism 16 is installed between each driving lead screw 11 and each driven lead screw 10, foot seats 2 are installed on the periphery of the lower surface of the bottom plate 1, and four foot seats 2 are arranged, install access door 4 on the preceding terminal surface of location base 3, one side of access door 4 is passed through hinge 24 and is connected with the casing rotation of location base 3, and hinge 24 is provided with two, and the opposite side of access door 4 is connected with location base 3 locking through spring lock 25.

Further, the internally mounted of location base 3 has pneumatic cylinder 30, the inside of jacking platform 5 is provided with interior cavity 31, the lower surface mounting of jacking platform 5 has baffle 33, pneumatic cylinder 30's output runs through baffle 33 and extends to the inside of interior cavity 31, and through connecting piece 32 and interior cavity 31 fixed connection, pneumatic cylinder 30 can drive jacking platform 5 and go up and down, make the PCB board that the location finishes can be better with the steel mesh laminating, in order to ensure printing quality.

Further, guide post 34 is all installed to the both sides of pneumatic cylinder 30, and the one end and the 3 inner wall fixed connection of location base of guide post 34, the other end of guide post 34 runs through baffle 33 and extends to the inside of interior cavity 31, and install stopper 36, linear bearing 35 is installed with the junction of baffle 33 to guide post 34, guide post 34 can play the effect of direction at the in-process that jacking platform 5 goes up and down, avoid it to take place the skew, and linear bearing 35 then can further promote the lift precision, ensure the stability of jacking.

Further, a filtering and pressure reducing valve 29 is installed on one side of the inner wall of the positioning base 3, the filtering and pressure reducing valve 29 is connected with the positioning base 3 through a bracket, an exhaust port 27 is formed in one side of the vacuum generator 21, an electromagnetic valve 28 is installed on the other side of the vacuum generator 21, the electromagnetic valve 28 is communicated with the exhaust end of the filtering and pressure reducing valve 29 through an air supply pipe 26, an air guide pipe is installed on an air inlet of the filtering and pressure reducing valve 29, one end of the air guide pipe is communicated with an air compressor, when the PCB is placed on the positioning panel 6, compressed air can be introduced into the vacuum generator 21 through the air compressor, suction force is generated by means of negative pressure, the PCB is firmly adsorbed on the panel, and positioning is achieved.

Further, the last surface mounting of locating panel 6 has sponge board 19, is provided with adsorption hole 20 on the sponge board 19, and adsorption hole 20 is provided with a plurality of, and all communicates with locating panel 6's inner chamber, and sponge board 19 surface is soft, and plasticity is high, and when adsorbing the PCB board of surface unevenness, even do not have the influence under the complete absorbent condition yet and absorb the location effect, can effectively realize the location demand of various PCB boards.

Further, belt driven guide rail 7 is installed to one side of locating panel 6, belt initiative guide rail 18 is installed to the opposite side of locating panel 6, install second step motor 23 on the outer wall of belt initiative guide rail 18 one end, belt driven guide rail 7 and belt initiative guide rail 18's one end are passed through gangbar 22 transmission and are connected, the belt guide rail can play and accept the PCB board, and shift the PCB board that the skip printing finishes to the effect of transmission platform, make the device can carry out automatic continuous processing, printing efficiency has effectively been improved.

Further, lead screw 37 is all installed to the inside of initiative lead screw 11 and driven lead screw 10, first step motor 12 is installed to the one end of initiative lead screw 11, and the output and the lead screw 37 transmission of first step motor 12 are connected, the one end of lead screw 37 runs through and extends to the outside of initiative lead screw 11 and driven lead screw 10, and install belt pulley 13, connect through 14 transmissions of belt between the belt pulley 13, install slider 15 on the lead screw 37, and slider 15 is connected with the lead screw 37 transmission, the both ends of clearance mechanism 16 all with slider 15 fixed connection, initiative lead screw 11 and driven lead screw 10 synergism, can drive clearance mechanism 16 and remove, and utilize clearance mechanism 16 to clear away the dust on PCB board surface, in order to guarantee subsequent printing effect.

Further, the upper end of the cleaning mechanism 16 is provided with a dust collecting pipe interface 17, one side inside the cleaning mechanism 16 is provided with a static removing brush 38, the static removing brush 38 is in threaded connection with the shell of the cleaning mechanism 16 through a screw, and when the lead screw drives the cleaning mechanism 16 to move, the static removing brush 38 can reduce the static electricity on the surface of the PCB plate and brush out the dust attached in the transmission process.

Further, the front end of the static removing brush 38 is provided with three suction fans 39, and the suction fans 39 are arranged in three positions, so that in the dust brushing process of the static removing brush 38, the suction fans 39 can further pump the dust to an external cloth bag for centralized collection.

Further, the use method of the PCB fixing device for the solder paste printer comprises the following steps:

the method comprises the following steps: the device is arranged in a solder paste printing machine, the jacking table 5 is positioned under the steel net rack, and the transmission tables are arranged at two ends of the solder paste printing machine;

step two: the PCB is conveyed to a positioning panel 6 through a conveying table, and is assisted to move to the center of the panel through belt guide rails on two sides of the panel;

step three: starting an external air compressor, performing pressure reduction and filtration treatment on the compressed air through a filter pressure reducing valve 29, introducing the compressed air into a vacuum generator 21, and firmly adsorbing the PCB on the positioning panel 6 by using vacuum suction force generated by negative pressure;

step four: starting a hydraulic cylinder 30 to drive the jacking table 5 to move upwards so as to enable the PCB to be attached to the cleaning mechanism 16, then driving the cleaning mechanism 16 to move from left to right along the surface of the PCB by utilizing a lead screw, brushing off dust on the outer wall of the PCB by a static removing hairbrush 38 in the cleaning mechanism 16 in the moving process, and collecting the dust to an external cloth bag by a suction fan 39 on one side of the hairbrush so as to finish the surface cleaning work of the PCB;

step five: the PCB board clearance back that finishes, further drive pneumatic cylinder 30, continue to drive jacking platform 5 and move up, make the close laminating of PCB board in the steel mesh, scrape about by the printing machine tin cream pass through the steel mesh and skip printing on the PCB board, after the skip printing finishes, jacking platform 5 resets, and close vacuum generator 21 and stop the adsorption work, shift the even PCB of skip printing to the transmission bench of delivery outlet through the belt guide rail of 6 both sides of location panel, further send the PCB board to the chip mounter by the transmission bench and carry out subsequent processing.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a PCB board fixing device for solder paste printing machine, includes bottom plate (1), its characterized in that: a positioning base (3) is arranged on the upper surface of the bottom plate (1), a jacking table (5) is arranged above the positioning base (3), the lower end of the jacking platform (5) extends into the positioning base (3), the upper end of the jacking platform (5) is provided with a vacuum generator (21), the upper surface of the vacuum generator (21) is provided with a positioning panel (6), the inner cavity of the positioning panel (6) is communicated with a vacuum generator (21), the periphery of the upper surface of the bottom plate (1) is provided with a support column (8), four support columns (8) are arranged, a support frame (9) is arranged at the upper end of each support column (8), one side of the upper surface of the supporting frame (9) is provided with a driving screw rod (11), the other side of the upper surface of the supporting frame (9) is provided with a driven screw rod (10), and a cleaning mechanism (16) is arranged between the driving lead screw (11) and the driven lead screw (10).

2. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: the internally mounted of location base (3) has pneumatic cylinder (30), the inside of jacking platform (5) is provided with interior cavity (31), the lower surface mounting of jacking platform (5) has baffle (33), the output of pneumatic cylinder (30) runs through baffle (33) and extends to the inside of interior cavity (31), and through connecting piece (32) and interior cavity (31) fixed connection.

3. The PCB fixing device for the solder paste printer as claimed in claim 2, wherein: guide post (34) are all installed to the both sides of pneumatic cylinder (30), and the one end and location base (3) inner wall fixed connection of guide post (34), the other end of guide post (34) runs through baffle (33) and extends to the inside of interior cavity (31), and installs stopper (36), linear bearing (35) are installed to the junction of guide post (34) and baffle (33).

4. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: filtration relief pressure valve (29) are installed to one side of location base (3) inner wall, and filter relief pressure valve (29) and be connected with location base (3) through the bracket, one side of vacuum generator (21) is provided with gas vent (27), solenoid valve (28) are installed to the opposite side of vacuum generator (21), solenoid valve (28) are linked together through the exhaust end of air supply pipe (26) with filtration relief pressure valve (29).

5. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: the upper surface mounting of locating panel (6) has sponge board (19), be provided with on sponge board (19) and adsorb hole (20), adsorb hole (20) and be provided with a plurality of, and all communicate with the inner chamber of locating panel (6).

6. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: the belt driven guide rail (7) is installed to one side of positioning panel (6), belt initiative guide rail (18) is installed to the opposite side of positioning panel (6), install second step motor (23) on the outer wall of belt initiative guide rail (18) one end, the one end of belt driven guide rail (7) and belt initiative guide rail (18) is passed through gangbar (22) transmission and is connected.

7. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: lead screw (37) are all installed to the inside of initiative lead screw (11) and driven lead screw (10), first step motor (12) are installed to the one end of initiative lead screw (11), and the output of first step motor (12) is connected with lead screw (37) transmission, the one end of lead screw (37) is run through and is extended to the outside of initiative lead screw (11) and driven lead screw (10), and installs belt pulley (13), connect through belt (14) transmission between belt pulley (13), install slider (15) on lead screw (37), and slider (15) are connected with lead screw (37) transmission, the both ends of clearance mechanism (16) all with slider (15) fixed connection.

8. The PCB fixing device for the solder paste printer as claimed in claim 1, wherein: the upper end of the cleaning mechanism (16) is provided with a dust collecting pipe interface (17), one side of the interior of the cleaning mechanism (16) is provided with a static removing brush (38), and the static removing brush (38) is in threaded connection with the shell of the cleaning mechanism (16) through a screw.

9. The PCB fixing device for the solder paste printer as claimed in claim 8, wherein: the front end of the static removing hairbrush (38) is provided with three exhaust fans (39), and the number of the exhaust fans (39) is three.

10. The use method of the PCB fixing device for the solder paste printer according to any one of the claims 1 to 9, characterized by comprising the following steps:

the method comprises the following steps: the device is arranged in a solder paste printing machine, the jacking table (5) is positioned under the steel net rack, and the transmission tables are arranged at two ends of the solder paste printing machine;

step two: the PCB is conveyed to a positioning panel (6) through a conveying table, and is assisted to move to the center of the panel through belt guide rails on two sides of the panel;

step three: starting an external air compressor, performing pressure reduction and filtration treatment on compressed air through a filter pressure reducing valve (29), introducing the compressed air into a vacuum generator (21), and firmly adsorbing the PCB on a positioning panel (6) by using vacuum suction force generated by negative pressure;

step four: starting a hydraulic cylinder (30) to drive a jacking table (5) to move upwards to enable the PCB to be attached to a cleaning mechanism (16), then driving the cleaning mechanism (16) to move from left to right along the surface of the PCB by utilizing a lead screw, brushing dust on the outer wall of the PCB by a static removing brush (38) in the cleaning mechanism (16) in the moving process, and collecting the dust to an external cloth bag by a suction fan (39) on one side of the brush to finish the surface cleaning work of the PCB;

step five: the PCB board clearance back that finishes, further drive pneumatic cylinder (30), continue to drive jacking platform (5) and shift up, make the close laminating of PCB board in the steel mesh, scrape the sword about by the printing machine and pass through the steel mesh screen printing on the PCB board with the tin cream, the screen printing back that finishes, jacking platform (5) reset, and close vacuum generator (21) and stop the adsorption work, the belt guide rail through locating panel (6) both sides shifts the even PCB of screen printing to the transmission bench of delivery outlet, further send the PCB board to the chip mounter by the transmission bench and carry out subsequent processing.